httptest を使用して Go で HTTP 呼び出しをテストする方法

<code class="go">import (
    "net/http"
    "net/http/httptest"
    "testing"

    "yourpackage"
)

func TestYourHTTPPost(t *testing.T) {
    ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintln(w, `response from the mock server goes here`)
        // you can also inspect the contents of r (the request) to assert over it
    }))
    defer ts.Close()

    mockServerURL := ts.URL

    message := "the message you want to test"

    resp, err := yourpackage.HTTPPost(message, mockServerURL)

    // assert over resp and err here
}</code>